Registro IPv4
host: promedmail.com
class: IN
ttl: 1800
type: A
ip: 141.8.225.76

Servidores DNS Principal (mname) y Secundario (rname)
host: promedmail.com
class: IN
ttl: 1800
type: SOA
mname: dns178.a.register.com
rname: root.register.com
serial: 2012040908
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: promedmail.com
class: IN
ttl: 1800
type: MX
pri: 0
target: guardian2.sph.harvard.edu

Servidor de Correo
host: promedmail.com
class: IN
ttl: 1800
type: MX
pri: 0
target: guardian.sph.harvard.edu